GSC Sentinel-2 PDGS OCD - Emits - ESA

More documents

Recommendations

Info

GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 144 of 350 4.5.4.5.4 Level-1C Processing 4.5.4.5.4.1 Digital Elevation Model Handling Based on the constraints highlighted in section 4.3.9.2.5, two DEMs at different spatial resolutions will be used for the Level-1 processing: o A nominal DEM at a fine spatial resolution and according the DTED1 class (resolution of 90m) such as the ones highlighted as candidates in section 4.3.9.2.5; o A backup DEM at a coarser resolution for areas not covered by the finer-resolution DEM. The backup DEM, called GLOBE, was generated based on two sources: NOAA GLOBE DEM and GTOPO30 (result of eight sources of altimetric data delivered by USGS). This DEM defines altitude information with an average value for all the point on a global grid with a kilometric resolution. It is characterised by an absolute horizontal accuracy (90% Circular Error) of 60 meters and an absolute vertical accuracy (90% Linear Error) of 100 meters. The quality of the DEM GLOBE is not sufficient for reaching the required Level 1C products absolute geolocation accuracy baselined in 4.4.4.1. It will be used only as backup if no global DEM of DTED1 class is available globally. To provide for flexibility in adapting to any global DEM that could be made available, DEM input to the Level-1 processing will comply with the generic DTED format (DTED1 or DTED2). The selected DTED DEM (with the GLOBE DEM as backup) will be used uniformly throughout the PDGS as a configurable GIPP to ensure consistency of the global Level-1C dataset. To ensure traceability, the derived geolocation accuracy and source DEM usage will be systematically traced back in every product as QI metadata. 4.5.4.5.4.2 Resampling The Level-1C processing algorithm includes an orthorectification step together with a resampling step mapping the images into a geocoded space to be usable by Sentinel-2 product users. The resampling step imposes geometric transformation of the pixels from the source instrument frame to the geocoded space. For this transformation an appropriate filter will be chosen as recommended in [RD-30]. The Level-1C data will be directly mapped into an earth fixed projection, widely used, and adapted as much as possible to the downstream usage of Sentinel-2. The standard UTM projection space has been chosen as the best compromise in this respect while ensuring the continuity and harmonisation with other data of the Sentinel-2 group of missions such as SPOT and Landsat. The Level-1C data will be provided at 10/20/60 meters spatial resolution corresponding to Level-1B resolution. As justified in [RD-30], the resampling to UTM from the instrument vieweing geometry may have to be performed on supersampled versions of the Level-1B images. This technique can also be applied by downstream users when performing remapping to other projection spaces required for their applications. ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 145 of 350 4.5.4.5.4.3 Griding and Tiling The Level-1C data, systematically ortho-rectified, spatially registered and geocoded in UTM projected space will be divided in tiles steadily mapped into a fixed global reference system, embedding the Level-1C multi-temporal spatial registration features (cf. previous paragraph). A tile sizing of 100km x 100km was chosen as a good compromise adapted to data selection granularity and transport. The tiling concept is illustrated on Figure 4-27 showing the standard 6º longitude x 8º latitude UTM zones divided into 100km x 100km tiles. one 100km x 100km tile Figure 4-27 Level-1C Tiling Concept in UTM The tiles will be generated during the resampling process on all intersections of the image footprint with the tiled reference system. This process is illustrated on Figure 4-28. Small overlaps across tiles will be generated at the boundaries of the UTM zones as naturally implied by the UTM projection space. The downstream product reconstruction mechanisms will allow the aggregation of several tiles of the same orbit into a single product as explained in section 4.4. ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
Page 1 and 2:
document title/ titre du document P
Page 3 and 4:
GSC Sentinel-2 PDGS OCD issue 1 rev
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
[RD-33] Sentinel-2 MSI - Level 2A A
Page 35 and 36:
Page 37 and 38:
LES LGS Land Equipped Sites Local G
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
3.5.2 MULTI-SPECTRAL INSTRUMENT CHA
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
ESA UNCLASSIFIED - For Official Use
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90: GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 97 and 98: Table 4-5 Radiometric image quality
Page 99 and 100: Product- Type On-Line retention Off
Page 101 and 102: ESA UNCLASSIFIED - For Official Use
Page 103 and 104: 4.5.1.5 Scalability and Flexibility
Page 139: GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 159 and 160: 4.6.3 OPERATIONAL TRANSFER BASELINE
Page 177 and 178: Product- Type Identifier S2MSI0 S2M
Page 191 and 192:
5 PDGS DESIGN GSC Sentinel-2 PDGS O
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
○ Effective processing resources
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
o preserving integrity of exchanged
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
6 DETAILED OPERATIONS CONCEPTS GSC
Page 245 and 246:
o Report generation frequency and c
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
○ MSI L1A, L1B, L1C and TCI produ
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Page 273 and 274:
Page 275 and 276:
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Page 287 and 288:
Page 289 and 290:
Some relevant use cases are present
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Two main mapping services have been
Page 327 and 328:
The requirement on the cloud covera
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
show all

GSC Sentinel-2 PDGS OCD - Emits - ESA

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?